Only enable PINIOBOX task when needed

Previously the task was always enabled and there's no reason for it to be running if there are no boxID associations.

Saves a few cycles by not running. But has a bigger effect on the scheduler by minimizing the number of active tasks when possible.

src/test/unit/arming_prevention_unittest.cc

@@ -1107,4 +1107,5 @@ extern "C" {
     void updateRcRefreshRate(timeUs_t) {};
     uint16_t getAverageSystemLoadPercent(void) { return 0; }
     bool isMotorProtocolEnabled(void) { return true; }
+    void pinioBoxTaskControl(void) {}
 }

src/test/unit/flight_failsafe_unittest.cc

@@ -598,4 +598,5 @@ bool areSticksActive(uint8_t stickPercentLimit) {
 void beeperConfirmationBeeps(uint8_t beepCount) { UNUSED(beepCount); }
 
 bool crashRecoveryModeActive(void) { return false; }
+void pinioBoxTaskControl(void) {}
 }

src/test/unit/flight_imu_unittest.cc

@@ -249,4 +249,5 @@ bool accGetAccumulationAverage(float *) { return false; }
 void mixerSetThrottleAngleCorrection(int) {};
 bool gpsRescueIsRunning(void) { return false; }
 bool isFixedWing(void) { return false; }
+void pinioBoxTaskControl(void) {}
 }

src/test/unit/ledstrip_unittest.cc

@@ -396,5 +396,5 @@ bool isFlipOverAfterCrashActive(void) { return false; }
 void ws2811LedStripEnable(void) { }
 
 void setUsedLedCount(unsigned) { };
-
+void pinioBoxTaskControl(void) {}
 }

src/test/unit/link_quality_unittest.cc

@@ -456,6 +456,7 @@ extern "C" {
     void resetPPMDataReceivedState(void){ }
     void failsafeOnValidDataReceived(void) { }
     void failsafeOnValidDataFailed(void) { }
+    void pinioBoxTaskControl(void) { }
 
     void rxPwmInit(rxRuntimeState_t *rxRuntimeState, rcReadRawDataFnPtr *callback)
     {

src/test/unit/rc_controls_unittest.cc

@@ -655,4 +655,5 @@ void resetTryingToArm(void) {}
 void setLedProfile(uint8_t profile) { UNUSED(profile); }
 uint8_t getLedProfile(void) { return 0; }
 void compassStartCalibration(void) {}
+void pinioBoxTaskControl(void) {}
 }

src/test/unit/rcdevice_unittest.cc

@@ -994,4 +994,5 @@ extern "C" {
     bool cmsInMenu;
     uint32_t resumeRefreshAt = 0;
     int getArmingDisableFlags(void) {return 0;}
+    void pinioBoxTaskControl(void) {}
 }

src/test/unit/rx_ranges_unittest.cc

@@ -243,4 +243,6 @@ float pt1FilterApply(pt1Filter_t *filter, float input)
     return 0.0;
 }
 
+void pinioBoxTaskControl(void) {}
+
 }

src/test/unit/rx_rx_unittest.cc

@@ -254,4 +254,6 @@ extern "C" {
         UNUSED(input);
         return 0.0;
     }
+
+    void pinioBoxTaskControl(void) {}
 }

src/test/unit/vtx_unittest.cc

@@ -192,4 +192,5 @@ extern "C" {
     void updateRcRefreshRate(timeUs_t) {};
     uint16_t getAverageSystemLoadPercent(void) { return 0; }
     bool isMotorProtocolEnabled(void) { return false; }
+    void pinioBoxTaskControl(void) {}
 }